I tested the new version and WiFiSpi.scanNetworks() goes fine.
Referring to the point b) of my previous submit, there is a need of
status = WiFiSpi.begin();
without (ssid, pass) or something else, to enable
int numSsid = WiFiSpi.scanNetworks();
since I do not even know the name of the AP.
Thank you.
PS:In my house 4 AP are installed, the sensors are in every room (14).
They connect to the nearest AP.
The application of the sensors does not have the coded SSID.